Separate projection mode from rest of touch HUD

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index 84fe09f2acc4557c38bbe6ec0fbedc2f7906c8f5..2b9a29f3e24647fd8696a6f458f9d5cd2677c378 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -208,7 +208,8 @@ Shell::Shell(ShellDelegate* delegate)
       cursor_manager_(scoped_ptr<views::corewm::NativeCursorManager>(
           native_cursor_manager_)),
       browser_context_(NULL),
-      simulate_modal_window_open_for_testing_(false) {
+      simulate_modal_window_open_for_testing_(false),
+      touch_hud_projection_enabled_(false) {
   DCHECK(delegate_.get());
   display_manager_.reset(new internal::DisplayManager);
   mirror_window_controller_.reset(new internal::MirrorWindowController);
@@ -849,6 +850,26 @@ LauncherDelegate* Shell::GetLauncherDelegate() {
   return launcher_delegate_.get();
 }
 
+void Shell::SetTouchHudProjectionEnabled(bool enabled) {
+  if (touch_hud_projection_enabled_ == enabled)
+    return;
+
+  RootWindowList roots = GetInstance()->GetAllRootWindows();
+  for (RootWindowList::iterator iter = roots.begin(); iter != roots.end();
+      ++iter) {
+    internal::RootWindowController* controller = GetRootWindowController(*iter);
+    if (enabled)
+      controller->EnableTouchHudProjection();
+    else
+      controller->DisableTouchHudProjection();
+  }
+  touch_hud_projection_enabled_ = enabled;
+}
+
+void Shell::ToggleTouchHudProjection() {
+  SetTouchHudProjectionEnabled(!touch_hud_projection_enabled_);
+}
+
 void Shell::InitRootWindowForSecondaryDisplay(aura::RootWindow* root) {
   aura::client::SetFocusClient(root, focus_client_.get());
   internal::RootWindowController* controller =
@@ -908,6 +929,7 @@ void Shell::InitRootWindowController(
 
   root_window->SetCursor(ui::kCursorPointer);
   controller->InitLayoutManagers();
+  controller->InitTouchHuds();
 
   // TODO(oshima): Move the instance to RootWindowController when
   // the extended desktop is enabled by default.